How to construct CMOS gates from Boolean expressions

[nobrainer612]

Homework Statement

It given the expression

. how to construct the complex CMOS gate by looking at the expression.

Homework Equations

The Attempt at a Solution

This solution is given as well.

I don't understand how he construct it. I know NAND is fromed by two PMOS in parallel at top and two NMOS in series at bottom. NOR is formed by two PMOS in series at top and two NMOS in parallel at bottom.

Like, are there any rule that says, if I see (A+B), the CMOS should be in parallel or series...?

Thank you

 

[nobrainer612]

nevermind. I know how to solve it